1,Suited to precision instruments. 2,Clean Precision Electronic Components. 3,Hard disk,magnetic head,chip,Lenses, etc. FeaturesWeight:140gsmPolyester and nylon blended micro-denier filament woven constructionQuantity:400pcs/bag(4inch),100pcs/bag(6inch),100pcs/bag(9inch)Benefitsstrong absorbing waterlow partical generationsoftness and no damage to the productgood results of recycle,strong wiping ...